题干

等腰△ABC中,AB=AC=5,△ABC的面积为10,则BC= ____

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25或45​

同类题1

七选五阅读,根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项多余选项。

Making Peace with Your Parents

    As a teen, you are going through big changes physically and mentally. Your interests are expanding(增加;扩大) ____.

    Here is the challenge: Kids need to explore the world in new ways, and parents need to protect them from the dangers that are all out in that world. These conflicts(冲突)can easily set off fireworks in otherwise calm house. Sometimes conflicts can't be avoided. But by paying attention to the building blocks of successful relationships, you can work towards making home a happy and healthy place for you and your parents.

    For instance, try to find a time to talk when your parents are not angry, tired, distracted , or hungry. A good time to talk is when you are all relaxed. Timing is everything. If the conversation begins to turn into an argument, you'd better calmly and coolly ask to stop the conversation----for now. ____ Listen to what your parents are saying, and repeat it back to them. This shows them that you're listening. ____.

    Respect is the building block of good communication. People who respect each other and care about each other's feelings can disagree without getting things ugly.

     ____How do you build trust? Trust comes by actually doing what you say you're going to do. Some teens find that doing fun activities with their parents can improve their relationships. Sometimes we forget that parents are more than rule-makers----they're interesting people who like to watch movies and go shopping----just like their teenagers!

    What do you do if you are trying your best, but your relationship with your parents continues to be rocky(难以维持的;不稳定的)? ____You can find supportive adults, such as a teacher or a coach, who can lead an ear.

    Remember you can only change your own behavior. Your parents are the only ones who can change theirs.

A. It also gives them a chance to clear things up if you're not on the same page.

B. You can pick it up again when everyone's more relaxed.

C. And then you will be able to accept what your parents say.

D. Faced with the challenge, children don't know what to do.

E. You are more likely to get along with your parents and have more independence if your parents believe in you.

F. And your desire to take control of your own life is growing.

G. You may consider seeking outside help.

同类题4

阅读下面的文字,完成后面小题。

    生态美学的研究对象应该是生态学和美学各自研究对象的交叉部分,即人与自然的和谐关系。生态学研究生物与其环境的关系,美学研究人与现实(自然、社会、艺术)的审美关系。生态学和美学的结合点在于人与自然关系的和谐。生态学研究物种之间的共生关系,也包括人与其环境、与其他物种关系的和谐。人与自然和谐也是美学的研究对象,生态美学不仅研究人和自然的和谐关系,而且研究人和自身的和谐关系。

    从学科性质上,生态美学的最终落脚点在美学,而美学的最终依据在哲学,也就是说,我们必须为生态美学找到其哲学依据。中国《周易》及道家思想、古希腊前苏格拉底哲学、印度《奥义书》等人类早期的哲学、宗教典籍里蕴涵了万物生成的思想。老子认为人和万物拥有同一个来源,那就是“道”,庄子也主张物我合一的自然哲学。人与万物同构、同源、同具有道性或神性,这是生态美学得以成立的哲学基础。首先,人与万物交换能量。人需要阳光、水、空气、食物,如果这些被污染被破坏,必然殃及人类自身。人的生命得以延续,时刻离不开自然界,所以人类应该节约能源,减少污染。其次,人与万物交换信息。人情感反映都是在与万物共在中发生、发展的,而不仅是人类改造自然的结果。再次,人与万物的关系不可能是主体与客体的关系,而在于我与你的关系,是互为主体的关系。万物的欣欣向荣必然使人感觉愉快,万物的肃杀衰败必然使人心生哀戚。从人和万物的生成角度,我们不仅能够找到生态美学的学科依据,也能够找到生态伦理学的学科依据。

    西方现代美学所探讨的人与万物之间的审美关系与现代生态学关于人和万物相互依赖关系的观点具有一致性。首先,认识论美学把人和审美对象的关系理解为主体和客体的关系,现代美学认为,在审美体验中对象有了知觉和情感,与人心灵得以沟通,因此审美主体和审美对象之间不是主体和客体的关系,而是主体间性的关系。其次,传统美学把感性认识和理性认识、抽象思维与逻辑思维对立起来,认为只有后者涉及真理,而现代美学认为它们原本就是共生的、同根同源的,思维包含了感性,艺术揭示着真理。

    从研究方法上,生态美学可能引入自然科学方法,但是更根本的是人文科学的方法,如现代解释学的体验、表达、理解等。数学可以给我们提供准确的数字,比如某些物种的数量及分布,使我们对于生态状况有直观的了解,但是数学不能解决生态美学的问题。庄子体会到鱼在水中畅游的快乐,现代人体会到藏羚羊趋于灭绝的痛苦,只能进行体验和解释,不能以科学实验来证明。